Generate new processbar every time when updated and traces won't vanish when leave is true

[AnnabellChan]

[ubershmekel]

I got this too with this code:

>>> import tqdm
>>> import time
>>> for i in tqdm.tqdm(range(int(1e6))):
...     if i % 1000 == 0:
...         time.sleep(0.01)
...
|----------| 49001/1000000   4% [elapsed: 00:00 left: 00:09, 98002.00 iters/sec]
|----------| 99001/1000000   9% [elapsed: 00:01 left: 00:09, 98902.11 iters/sec]
|#---------| 149001/1000000  14% [elapsed: 00:01 left: 00:08, 99267.83 iters/sec
|#---------| 199001/1000000  19% [elapsed: 00:02 left: 00:08, 99450.78 iters/sec
|##--------| 249001/1000000  24% [elapsed: 00:02 left: 00:07, 99560.58 iters/sec
|##--------| 299001/1000000  29% [elapsed: 00:03 left: 00:07, 99633.79 iters/sec
|###-------| 349001/1000000  34% [elapsed: 00:03 left: 00:06, 99686.09 iters/sec
|###-------| 399001/1000000  39% [elapsed: 00:04 left: 00:06, 99725.32 iters/sec
|####------| 449001/1000000  44% [elapsed: 00:04 left: 00:05, 99733.67 iters/sec
|####------| 499001/1000000  49% [elapsed: 00:05 left: 00:05, 99760.29 iters/sec
|#####-----| 549001/1000000  54% [elapsed: 00:05 left: 00:04, 99782.08 iters/sec
|#####-----| 599001/1000000  59% [elapsed: 00:06 left: 00:04, 99783.61 iters/sec
|######----| 649001/1000000  64% [elapsed: 00:06 left: 00:03, 99800.25 iters/sec
|######----| 699001/1000000  69% [elapsed: 00:07 left: 00:03, 99814.51 iters/sec
|#######---| 749001/1000000  74% [elapsed: 00:07 left: 00:02, 99826.87 iters/sec
|#######---| 799001/1000000  79% [elapsed: 00:08 left: 00:02, 99837.69 iters/sec
|########--| 849001/1000000  84% [elapsed: 00:08 left: 00:01, 99835.49 iters/sec
|########--| 899001/1000000  89% [elapsed: 00:09 left: 00:01, 99844.63 iters/sec
|#########-| 949001/1000000  94% [elapsed: 00:09 left: 00:00, 99852.80 iters/sec
|#########-| 999001/1000000  99% [elapsed: 00:10 left: 00:00, 99860.16 iters/sec

>>>

Windows doesn't really let you modify the cmd console width.